package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Slf4j
@Service
public class DishServiceImpl implements DishService {

    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;


    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        dishMapper.insert(dish);
        Long dishId = dish.getId();
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishId);
            });
            //向口味表插入n条数据
            dishFlavorMapper.insertBatch(flavors);//后绪步骤实现
        }
    }

    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());
        Page<DishVO> objects=dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(objects.getTotal(), objects.getResult());
    }

    @Override
    @Transactional
    public void deleteBatch(List<Long> ids) {
        //看菜品是不是在售
        log.info("看菜品是不是在售");
        for (Long id : ids) {
            Dish byId = dishMapper.getById(id);
            if (byId.getStatus() == StatusConstant.ENABLE) {
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
        //看是不是被套餐关联了
        log.info("看是不是被套餐关联了");
        List<Long> list=setmealDishMapper.getSetmealIdsByDishIds(ids);
        if (list != null && list.size() > 0) {
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
        //删除dish表
        log.info("删除dish表");
        dishMapper.deleteByIds(ids);
        //删除关联的flavor表
        log.info("删除关联的flavor表");
        dishFlavorMapper.deleteByIds(ids);
    }

    @Override
    public DishVO getByIdWithFlavor(Long id) {
        Dish byId = dishMapper.getById(id);
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(byId, dishVO);
        List<DishFlavor> list=dishFlavorMapper.getByDishId(id);
        dishVO.setFlavors(list);
        return dishVO;
    }

    @Transactional
    @Override
    public void updateWithFlavor(DishDTO dishDTO) {
        //修改的两个表，一个dish，一个dish_flavor。现在直接更新dish
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        dishMapper.update(dish);
        //删除flavor
        List<Long> ids=new ArrayList<>();
        ids.add(dishDTO.getId());
        dishFlavorMapper.deleteByIds(ids);
        //插入flavor
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dish.getId());
            });
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    public List<Dish> list(Long categoryId) {
        Dish dish = Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        return dishMapper.list(dish);
    }

    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }

    @Override
    public void updateStatus(Integer status, Long id) {
        if(status==StatusConstant.DISABLE){
            List<SetmealDish> byDishId = setmealDishMapper.getByDishId(id);
            if(byDishId!=null && byDishId.size()>0){
                throw new DeletionNotAllowedException("起售菜品关联套餐");
            }
        }
        Dish byId = dishMapper.getById(id);
        byId.setStatus(status);
        dishMapper.update(byId);
        log.info("完成了起售停");
    }
}
